Physiology of Finfish and Shellfish (2+1)

Procedure

A known volume of water is taken in a jar with fish. 100ml water sample is taken before introduction of fish. Add 10drops of phenolphthalein indicator in the flask and the sample solution is titrated with N/44 NaOH solution till the end point (light pink) appears. Same procedure is repeated with the water sample taken from the jar with the interval of 30 minutes.